package com.lazyfish.superdir.interceptor;
import com.lazyfish.superdir.entity.User;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
        boolean result = true;
        //获取请求的RUi:去除http:localhost:8080这部分剩下的
        String uri = request.getRequestURI();
        //UTL:除了login.html是可以公开访问的，其他的URL都进行拦截控制
        if (uri.indexOf("/login") < 0 && uri.indexOf("/upload") < 0 &&  uri.indexOf("/FileUpload")  < 0 && uri.indexOf("/Dir_getDir")  < 0 && uri.indexOf("/Dir_login" )  < 0 && uri.indexOf("/query")  < 0 && uri.indexOf("/img")  < 0 && uri.indexOf("/getStudentPositive")  < 0) {//获取session
            HttpSession session = request.getSession();
            User user = (User) session.getAttribute("USER_SESSION");//判断session中是否有用户数据，如果有，则返回true，继续向下执行
            if (user == null) {//不符合条件的给出提示信息，并转发到登录页面
                response.setContentType("text/json;charset=utf-8");
                response.sendRedirect(request.getContextPath()+"/login.html");
                result = false;
            }
        }
        return result;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}